Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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An Evaluation on High Temperature Oxidation Resistance of EB-PVD Thermal Barrier Coatings

전자빔 증착법에 의한 열차폐코팅의 고온 내산화성 평가

  • Kim, Jong-H. (Department of Advanced Materials Engineering, Andong National University) ;
  • Jeong, Se-I. (Department of Advanced Materials Engineering, Andong National University) ;
  • Lee, Ku-H. (Surface Technology Research Center, Korea Institute of Machinery and Materials) ;
  • Lee, Eui-Y. (Department of Advanced Materials Engineering, Andong National University)
  • 김종하 (안동대학교 신소재공학부) ;
  • 정세일 (안동대학교 신소재공학부) ;
  • 이구현 (한국기계연구원 재료기술연구소 표면기술연구센터) ;
  • 이의열 (안동대학교 신소재공학부)
  • Published : 2006.08.30
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Abstract

Failure mechanisms of electron beam physical vapor deposited thermal barrier coatings(EB-PVD TBCs) that occur during thermal cyclic oxidation were investigated. The investigations include microstructural degradation of NiCrAIY bond coat, thermally grown oxides(TGOs) along the ceramic top coat-substrate interface and fracture path within TBCs. The microstructural degradation of the bond coat during cyclic oxidation created Al depleted zones, resulting in reduction of NiAl and ${\gamma}$-Ni solid solution phase. It was observed that the fracture took placed primarily within the TGOs or at the interfaces between TGOs and bond coat.

Keywords

References

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